CN110011014A - Waveguide filter and its manufacturing method - Google Patents
Waveguide filter and its manufacturing method Download PDFInfo
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- CN110011014A CN110011014A CN201910342676.1A CN201910342676A CN110011014A CN 110011014 A CN110011014 A CN 110011014A CN 201910342676 A CN201910342676 A CN 201910342676A CN 110011014 A CN110011014 A CN 110011014A
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- waveguide
- hemispherical resonator
- resonator device
- wave guide
- ring flange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
- H01P1/2082—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with multimode resonators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/007—Manufacturing frequency-selective devices
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- Manufacturing & Machinery (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a kind of waveguide filters, are related to Electromagnetic Field and Microwave Technology field.The waveguide filter includes: first wave guide ring flange, second waveguide ring flange, first wave guide, second waveguide and four hemispherical resonator devices.The rectangular channel that perforation is offered on the cavity wall of hemispherical resonator device, for inhibiting the electromagnetic wave higher order resonances mode in hemispherical resonator device, with this expand waveguide filter without parasitic stopband bandwidth.The invention also discloses a kind of manufacturing methods of waveguide filter, waveguide filter structure is integrally printed using metal powder material by selective laser sintering 3-D printer, without assembly and debugging while realizing accurate processing, manufacture efficiency is effectively improved.
Description
Technical field
The present invention relates to Electromagnetic Field and Microwave Technology field more particularly to a kind of waveguide filter and its manufacturing methods.
Background technique
The metal cavity resonator of air filling is one of microwave and millimeter wave passive circuit basic frequency selecting unit,
With radio frequency loss is low and the big advantage of power capacity, in engineering practices such as filter, multiplexer, antenna and impedance matching networks
In be widely used.In general, these passive devices or circuit requirement metal cavity resonator Q-unloaded with higher
To reduce radio frequency loss.
The rectangle and cylindrical resonator of air filling are two kinds of common high Q-unloaded cavity resonators, usually
It is processed using traditional manufacture process that subtracts such as computer numerical control milling.It is a kind of with higher Q-unloaded to occur
Metal cavity resonator is the spherical resonator of air filling.But spherical resonator because with high degree of symmetry physical structure,
Electromagnetic wave mode of resonance height degeneracy therein, and the resonance frequency of electromagnetic wave higher modes close basic mode on frequency spectrum.For
For the application of bandpass filter, which has limited the bandwidth of rejection of filter and belt resistance inhibitor systems.
The physical structure of microwave and millimeter wave device based on spherical resonator is complicated, it is difficult to use computer numerical control miller skill
It efficiently manufactures, and processes this kind of cavity devices and generally require for structure to be split as multiple components to process respectively, finally again again
It is assembled together.Such cooked mode manufacture efficiency is low, is needed in assembling process using fasteners such as a large amount of screws and pins,
And rigging error is big, and redundancy structure material is more, is unfavorable for realizing cavity filtering unit in microwave and millimeter wave communication system
It is high-performance, quick and integrated.
Summary of the invention
The main purpose of the present invention is to provide a kind of waveguide filter and its manufacturing methods, it is intended to solve to be based on spherical cavity
In the waveguide filter of body resonator, the spurious resonance that electromagnetic wave higher modes introduce is not inhibited, no parasitic stopband bandwidth
It is narrow, belt resistance inhibitor system difference and the big technical problem of filter integration machine-shaping difficulty.
To achieve the above object, first aspect present invention provides a kind of waveguide filter, and the waveguide filter includes:
One waveguide flange, second waveguide ring flange, first wave guide, second waveguide and four hemispherical resonator devices；
The first wave guide and the second waveguide are rectangular waveguide, one end of the first wave guide and the first wave
It leads ring flange to be connected, the other end is connected with hemispherical resonator device, one end of the second waveguide and the second waveguide ring flange phase
Even, the other end is connected with hemispherical resonator device；
Four hemispherical resonator devices are arranged between the first wave guide and second waveguide, are the chamber of air filling
Body resonator, the baseplane between the adjacent device of hemispherical resonator two-by-two mutually abut and misplace and cascade and arrange in conllinear formula；
The hemisphere top surface of four hemispherical resonator devices offers the rectangular channel of perforation；
The rectangular channel of the hemispherical resonator device is axisymmetricly opened up along the hemispherical line of symmetry of hemispherical resonator device；It is described
The input port for extending perpendicularly to first wave guide ring flange and second waveguide flange for the rectangular channel that hemispherical resonator device opens up
Line between the output port of disk；
Circular window is offered at four hemispherical resonator devices mutually abutting for carrying out between adjacent hemispherical resonator device
The coupling of electromagnetic energy, head and the tail two hemispherical resonator device baseplanes on offer semicircle window for respectively with first wave
Lead and second waveguide carry out electromagnetic energy coupling.
Second aspect of the present invention provides a kind of waveguide filter, and the waveguide filter includes: first wave guide ring flange,
Two waveguide flanges, first wave guide, second waveguide and four hemispherical resonator devices；
The first wave guide and the second waveguide are rectangular waveguide, one end of the first wave guide and the first wave
It leads ring flange to be connected, the other end is connected with hemispherical resonator device, one end of the second waveguide and the second waveguide ring flange phase
Even, the other end is connected with hemispherical resonator device；
Four hemispherical resonator devices are arranged between the first wave guide and second waveguide, are the chamber of air filling
Body resonator, four hemispherical resonator devices include: two and are coupled respectively with the first wave guide and the second waveguide
Slotless hemispherical resonator device, and two fluting hemispherical resonator devices being coupled respectively with two slotless hemispherical resonator devices；
Two fluting hemispherical resonator devices and two slotless hemispherical resonator device baseplanes directions are consistent, adjacent two-by-two
Cascade is mutually abutted between hemispherical resonator device and is arranged in conllinear formula；
The baseplane and hemisphere top surface of the fluting hemispherical resonator device offer the rectangular channel of perforation；
The rectangular channel of the fluting hemispherical resonator device hemisphere top surface and baseplane is along the fluting hemispherical resonator device hemisphere face
Line of symmetry axisymmetricly open up；The extending direction for the rectangular channel that the fluting hemispherical resonator device hemisphere top surface and baseplane open up
Input port perpendicular to first wave guide ring flange and the line between the output port of second waveguide ring flange；
Offered at the abutting of the two neighboring hemispherical resonator device rectangular window between adjacent hemispherical resonator device into
The coupling of row electromagnetic energy, head and the tail two slotless hemispherical resonator device baseplanes on offer semicircle window for respectively with
First wave guide and second waveguide carry out the coupling of electromagnetic energy.
Third aspect present invention provides a kind of manufacturing method of waveguide filter, this method comprises:
The putting angle of the electronic model of waveguide filter is adjusted in the system platform of selective laser sintering 3-D printer
Degree makes the electronic model tilt preset angle, uses metal powder material using the selective laser sintering 3-D printer
Material prints original workpiece corresponding with the electronic model；
Wherein, the original workpiece includes: first wave guide ring flange, second waveguide ring flange, first wave guide, second waveguide
With four hemispherical resonator devices, the original workpiece is the entirety that can not be split；
The metal supports generated in selective laser sintering process on the original workpiece outer surface are removed, and right
Original workpiece carries out polishing and blasting treatment, obtains the waveguide filter.
The present invention provides a kind of waveguide filter and its manufacturing method, beneficial effect are: by hemisphere resonator cavity
Body wall opens up the rectangular channel of perforation, restrained effectively the electromagnetic wave higher order resonances mode in hemispherical resonator device, has expanded waveguide
Filter without parasitic stopband bandwidth, and improve belt resistance inhibitor system；Waveguide filter passes through selection using metal powder material
Property laser sintered 3-D printer integrally print, without assembly and debugging while realizing accurate processing, effectively mention
High manufacture efficiency.
Detailed description of the invention
It in order to illustrate the embodiments of the present invention more clearly or prior art, below will be to embodiment or prior art side
Attached drawing used in case is briefly described.It should be noted that the accompanying drawings in the following description is only some realities of the invention
Example is applied, to those skilled in the art, without creative efforts, can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is a kind of inclined shaft mapping for waveguide filter that the embodiment of the present invention one provides；
Fig. 2 is a kind of cross-sectional view in waveguide filter direction A-A ' along Fig. 1 that the embodiment of the present invention one provides；
Fig. 3 is a kind of structural schematic diagram of the waveguide flange for waveguide filter that the embodiment of the present invention one provides；
Fig. 4 is a kind of inclined shaft mapping of waveguide filter provided by Embodiment 2 of the present invention；
Fig. 5 is a kind of cross-sectional view in waveguide filter direction A-A ' along Fig. 4 provided by Embodiment 2 of the present invention；
Waveguide filter fluting front and back is in X to K in the embodiment one that Fig. 6 is related to for Fig. 1, Fig. 2 and Fig. 3 of the present inventionuFrequency range
Transmission coefficient (the S of interior emulation21Parameter) curve graph；
Waveguide filter fluting front and back is in X to K in the embodiment two that Fig. 7 is related to for Fig. 4 of the present invention and Fig. 5uIt is imitated in frequency range
Genuine transmission coefficient (S21Parameter) curve graph；
A kind of Fig. 8 flow diagram of waveguide filter manufacturing method provided in an embodiment of the present invention；
The scattering parameter of waveguide filter emulation and measurement in the embodiment one that Fig. 9 is related to for Fig. 1, Fig. 2 and Fig. 3 of the present invention
(S parameter) curve graph；
Scattering parameter (the S of waveguide filter emulation and measurement in the embodiment two that Figure 10 is related to for Fig. 4 of the present invention and Fig. 5
Parameter) curve graph.
In example 1, each appended drawing reference indicates:
1, first wave guide ring flange；2, second waveguide ring flange；3, the first hemispherical resonator device；301, the first rectangular channel；31,
Second hemispherical resonator device；311, the second rectangular channel；32, third hemispherical resonator device；321, third rectangular channel；33, the 4th hemisphere is humorous
Shake device；331, the 4th rectangular channel；302, the first circular window；312, the second circular window；322, third circular window；303,
Half circular window；332, the second semicircle window；4, first wave guide；5, second waveguide；6, through-hole.
In example 2, each appended drawing reference indicates:
11, first wave guide ring flange；12, second waveguide ring flange；13, the first slotless hemispherical resonator device；14, the second slotless
Hemispherical resonator device；15, the first fluting hemispherical resonator device；16, the second fluting hemispherical resonator device；131, the first rectangular window；151,
Second rectangular window；161, third rectangular window；132, the first semicircle window；141, the second semicircle window；152, first
Rectangular channel；153, the second rectangular channel；162, third rectangular channel；163, the 4th rectangular channel；17, first wave guide；18, second waveguide.
Specific embodiment
To enable objects, features and advantages of the present invention more obvious and easy to understand, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention carry out complete display description.It should be noted that described real
Applying example is only a part of the embodiment of the present invention, and not all embodiments.Based on the embodiments of the present invention, those skilled in the art
Member's all other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the embodiment of the present invention, given structure size is that preferred parameter is repaired referring to the embodiment of the present invention
The dimensional parameters for changing all parts can further obtain actually required performance.
Fig. 1 and Fig. 2 are please referred to, Fig. 1 is a kind of inclined shaft mapping for waveguide filter that the embodiment of the present invention one provides, Fig. 2
For a kind of cross-sectional view in waveguide filter direction A-A ' along Fig. 1 that the embodiment of the present invention one provides, which includes:
First wave guide ring flange 1, second waveguide ring flange 2, first wave guide 4, second waveguide 5 and four hemispherical resonator devices；
Specifically, from first wave guide 4 to the sequence of second waveguide 5, four hemispherical resonator devices are respectively the first hemispherical resonator device 3, second
Hemispherical resonator device 31, third hemispherical resonator device 32 and the 4th hemispherical resonator device 33.
Wherein, flange is part interconnected between waveguide mouth and waveguide mouth, for the connection between waveguide ends.Wave
Ring flange is led to refer to by the flange that is fixed on waveguide terminal of setting, and it is mountable in order to use is directed at and clamped with companion flange
Accessory.The size of first wave guide ring flange 1 and second waveguide ring flange 2 in the embodiment of the present invention one is WR- under X frequency range
The section of 90 standard rectangular waveguide flange sizes, first wave guide ring flange 1 and second waveguide ring flange 2 is rectangle.
Further, in electromagnetism and communication engineering, waveguide refers to the physics that electromagnetic energy is transmitted between its port
Structure, common guided wave structure mainly have parallel double conducting wire, coaxial line, parallel flat waveguide, rectangular waveguide, circular waveguide, micro-strip
Line and slab dielectric optical waveguide etc..From the point of view of conduction electromagnetic wave, above-mentioned waveguiding structure can all be divided into interior zone and outside
Region, electromagnetic wave, which is commonly bundled, is tied to the propagation of waveguide interior zone.In embodiments of the present invention, what is used is guided wave structure for rectangle
Waveguide, the section of rectangular waveguide are rectangle, inside filling air.
Further, the first wave guide 4 and the second waveguide 5 are rectangular waveguide, one end of the first wave guide 4
It is connected with the first wave guide ring flange 1, the other end is connected with the first hemispherical resonator device 3, one end of the second waveguide 5 and institute
It states second waveguide ring flange 2 to be connected, the other end is connected with the 4th hemispherical resonator device 33；
Further, the first hemispherical resonator device 3, the second hemispherical resonator device 31, third hemispherical resonator device 32 and the 4th hemisphere
Resonator 33 is arranged in sequence between the first wave guide 4 and second waveguide 5, and is the cavity resonant of air filling
Device, the baseplane between the adjacent device of hemispherical resonator two-by-two mutually abut and misplace and cascade and arrange in conllinear formula.
Further, the hemisphere top surface of the first hemispherical resonator device 3 offers the first rectangular channel 301；, the second hemispherical resonator device
31 hemisphere top surface offers the second rectangular channel 311；The hemisphere top surface of third hemispherical resonator device 32 offers third rectangular channel
321；And the 4th the hemisphere top surface of hemispherical resonator device 33 offer the 4th rectangular channel 331, and the half of four hemispherical resonator devices
The rectangular channel that top dome face opens up all penetrates through hemisphere top surface.
Further, the rectangular channel of the hemispherical resonator device along the hemispherical line of symmetry of hemispherical resonator device axisymmetricly
It opens up；The extending direction for the rectangular channel that the hemispherical resonator device opens up be each perpendicular to first wave guide ring flange 1 input port and
Line between the output port of second waveguide ring flange 2.
Further, the Mode Coupling between the first hemispherical resonator device 3 and the second hemispherical resonator device 31 opened up by it
One circular window 302 is realized；What the Mode Coupling between the second hemispherical resonator device 31 and third hemispherical resonator device 32 was opened up by it
Second circular window 312 is realized；Mode Coupling between third hemispherical resonator device 32 and the 4th hemispherical resonator device 33 is opened up by it
Third circular window 322 realize；Coupling between first hemispherical resonator device 3 and first wave guide 4 opened up by it the first half
Circular window 303 is realized；The second semicircular window that coupling between 4th hemispherical resonator device 33 and second waveguide 5 is opened up by it
Mouth 332 is realized.By adjusting the radius of the first circular window 302, adjustable first hemispherical resonator device 3 and the second hemispherical resonator
The intensity of Mode Coupling between device 31；By adjusting the radius of the second circular window 312, adjustable second hemispherical resonator device
The intensity of Mode Coupling between 31 and third hemispherical resonator device 32；By adjusting the radius of third circular window 322, can adjust
The intensity for saving the Mode Coupling between third hemispherical resonator device 32 and the 4th hemispherical resonator device 33, to design required filter
Wave device bandwidth.By adjusting the radius of the first semicircle window 303, adjustable first hemispherical resonator device 3 and first wave guide 4
Stiffness of coupling, by adjusting the radius of the second semicircle window 332, adjustable 4th hemispherical resonator device 33 and second waveguide 5
Stiffness of coupling, thus realize required for bandpass filtering response.
Specifically, the first circular window 302, the second circular window 312, third circular window 322 radius be respectively
4.241 millimeters, 3.977 millimeters and 4.241 millimeters, the radius of the first semicircle window 303 and the second semicircle window 332 is
7.297mm。
Referring to Fig. 3, the structure that Fig. 3 is a kind of waveguide flange for waveguide filter that the embodiment of the present invention one provides is shown
It is intended to.First wave guide ring flange 1 and second waveguide ring flange 2 are X frequency range standard rectangular waveguide flange WR-90 size, wave
Leading mouth width edge lengths is a, and a is 22.86 millimeters, and narrow side length is b, and b is 10.16 millimeters.As shown in figure 3, first wave guide flange
Containing there are four the through-hole 6 of axial symmetry distribution, waveguide filter uses screw in actual use for disk 1 and second waveguide ring flange 2
It is connect by through-hole 6 with other waveguide assemblies with nut.The detailed dimensions and lead to the hole site of ring flange are referring to national standard code BJ100
WR-90 ring flange and through-hole parameter in standard.
In the present embodiment one, the thickness of first wave guide ring flange 1 and second waveguide ring flange 2 is 3 millimeters, first wave
Lead 4 and second waveguide 5 length be 20 millimeters.
Embodiment according to the present invention one, waveguide filter include four hemispherical resonators for offering the rectangular channel of perforation
The native resonant frequency of device, each hemispherical resonator device determines by the air chamber radius r of hemisphere, the air chamber radius of hemispherical resonator device
Bigger, native resonant frequency is lower.
The basic mode TM of free space lower semisphere resonator101The resonance frequency of mould is determined that formula 1 is expressed as follows by formula 1:
In equation 1, the unit of r is millimeter, and the size that the rectangular channel of perforation opens up is not deteriorating hemispherical resonator device significantly
Basic mode TM101In the range of the Q-unloaded of mould, to TM101The influence of the resonance frequency of mould can be ignored.
First and second higher order resonances mode TM of free space lower semisphere resonator2m1Mould and TE101Mould it is intrinsic humorous
Vibration frequency is determined that formula 2 is expressed as follows by formula 2 and formula 3 respectively:
Formula 3 is expressed as follows:
For example, the hemispherical resonator device that an air chamber radius is 13.1 millimeters, basic mode TM101The native resonant frequency of mould
About 10GHz, first and second higher order resonances mode TM2m1Mould and TE101The native resonant frequency of mould respectively may be about 14.1GHz
And 16.37GHz.Specifically, in the embodiment of the present invention one, in order to realize that the passband central frequency of waveguide filter exists
10GHz, according to from first wave guide ring flange 1 to the sequence of second waveguide ring flange 2, four hemispherical resonator devices, i.e. the first hemisphere
Resonator 3, the second hemispherical resonator device 31, third hemispherical resonator device 32 and the 4th hemispherical resonator device 33 radius be respectively 12.691
Millimeter, 12.981 millimeters, 12.981 millimeters and 12.691 millimeters.The hemisphere baseplane cavity wall thickness of four hemispherical resonator devices is equal
It is 1 millimeter, hemisphere top surface cavity wall thickness is 3 millimeters.
Embodiment according to the present invention one, four it is described fluting hemispherical resonator device hemisphere top surface on offer perforation
Rectangular channel, the rectangular channel offer following characteristics:
1. the slotting length direction of rectangular channel is perpendicular to needing repressed TM in hemispherical resonator device2m1Mould and TE101Mould exists
Inductive current direction on hemisphere face, and the slotting position of rectangular channel is located at TM2m1Mould and TE101The induced current density of mould is most
Big region.The first rectangular channel 301 for particularly, in example 1, being opened up on the hemisphere top surface of the first hemispherical resonator device 3,
On the hemisphere top surface of the second rectangular channel 311, third hemispherical resonator device 32 that are opened up on the hemisphere top surface of second hemispherical resonator device 31
The fluting of the 4th rectangular channel 331 opened up on the hemisphere top surface of the third rectangular channel 321 and the 4th hemispherical resonator device 33 that open up is long
Degree direction is each perpendicular to the line between the input port of first wave guide ring flange 1 and the output port of second waveguide ring flange 2；
2. rectangular channel is axisymmetricly opened up along the hemisphere face line of symmetry of corresponding hemispherical resonator device；
3. the purpose that opens up of the rectangular channel of perforation is to destroy TM2m1Mould and TE101The induced current of mould is distributed with maximum journey
Degree ground inhibits both higher modes.The length and width that rectangular channel opens up meets to TM2m1Mould and TE101Mould realizes sufficiently suppression
System, while not deteriorating basic mode TM significantly101The Q-unloaded of mould.Specifically, in the embodiment of the present invention one, four and half
The corresponding centre of sphere angle of length that opens up of the rectangular channel of ball resonator is 90 degree, and width is 4 millimeters.
Fig. 4 and Fig. 5 are please referred to, Fig. 4 and Fig. 5 are that a kind of inclined shaft of waveguide filter provided by Embodiment 2 of the present invention is surveyed
Figure, Fig. 5 are a kind of cross-sectional view in waveguide filter direction A-A ' along Fig. 4 provided by Embodiment 2 of the present invention, the guide filter
Device includes:
First wave guide ring flange 11, second waveguide ring flange 12, first wave guide 17, second waveguide 18 and four hemispherical resonators
Device；Four hemispherical resonator devices include: the first slotless hemispherical resonator device being connected respectively with first wave guide 17 and second waveguide 18
13 and the second slotless hemispherical resonator device 14, and respectively with the first slotless hemispherical resonator device 13 and the second slotless hemispherical resonator device 14
Be connected first fluting hemispherical resonator device 15 and second fluting hemispherical resonator device 16, it is described first fluting hemispherical resonator device 15 and
Second fluting hemispherical resonator device 16 is connected.
Further, the first wave guide 17 and the second waveguide 18 are rectangular waveguide, the first wave guide 17
One end is connected with the first wave guide ring flange 11, and the other end is connected with the first slotless hemispherical resonator device 13, the second waveguide
18 one end is connected with the second waveguide ring flange 12, and the other end is connected with the second slotless hemispherical resonator device 14.The present invention is real
The size for applying first wave guide ring flange 11 and second waveguide ring flange 12 in example two is WR-90 standard rectangular wave under X frequency range
Lead ring flange size, the section of first wave guide ring flange 11 and second waveguide ring flange 12 is rectangle.In the present embodiment two,
With a thickness of 4 millimeters, the length of first wave guide 17 and second waveguide is 20 for first wave guide ring flange 11 and second waveguide ring flange 12
Millimeter.
Further, four hemispherical resonator devices are arranged between the first wave guide 17 and second waveguide 18, and
It is the cavity resonator of air filling, wherein above structure is according to first wave guide 17, the first slotless hemispherical resonator device 13, the
One fluting hemispherical resonator device 15, second slot hemispherical resonator device 16, the second slotless hemispherical resonator device 14, second waveguide 18 sequence
It is fixedly connected.Specifically, the first slotless hemispherical resonator device 13, first fluting hemispherical resonator device 15, second fluting hemispherical resonator device
16 and second the radius of slotless hemispherical resonator device 14 be respectively 12.599 millimeters, 12.749 millimeters, 12.749 millimeters and 12.599
Millimeter.The hemisphere baseplane cavity wall of hemispherical resonator device is with a thickness of 3 millimeters, and hemisphere top surface cavity wall is with a thickness of 3 millimeters.
Further, two fluting hemispherical resonator devices and two slotless hemispherical resonator device baseplanes directions one
It causes, mutually abut cascade between adjacent hemispherical resonator device two-by-two and arranges in conllinear formula；
Further, the Mode Coupling between the two neighboring hemispherical resonator device of waveguide filter is offseted by hemispherical resonator device
It connects the rectangular window that place opens up to realize, i.e. mould between the first slotless hemispherical resonator device 13 and the first fluting hemispherical resonator device 15
Formula coupling abuts against the first rectangular window 131 that place opens up by it and realizes, the first fluting hemispherical resonator device 15 and the second fluting
Mode Coupling between hemispherical resonator device 16 abuts against the second rectangular window 151 that place opens up by it and realizes, the second fluting half
Mode Coupling between ball resonator 16 and the second slotless hemispherical resonator device 14 abuts against the third rectangular window that place opens up by it
Mouth 161 is realized, by adjusting the width and height of these rectangular windows, coupling between the grade of adjustable two neighboring hemispherical resonator device
Intensity is closed, to design required filter bandwidht.The input and output coupling of waveguide filter passes through two slotlesses of head and the tail
The semicircular window cause for gossip that is opened up on hemispherical resonator device baseplane is existing, i.e. the first slotless hemispherical resonator device 13 and first wave guide 17
The first semicircle realization of window 132 that coupling is opened up by it, the coupling of the second slotless hemispherical resonator device 14 and second waveguide 18
It is realized by the second semicircle window 141 that it is opened up, by adjusting the first semicircle window 132 and the second semicircle window
141 radius, adjustable waveguide filter output and input stiffness of coupling, so that bandpass filtering required for realizing is rung
It answers.Specifically, the width of the first rectangular window 131, the second rectangular window 151 and third rectangular window 161 is respectively 9.209 millis
Rice, 8.498 millimeters and 9.209 millimeters, are highly 6 millimeters.Cavity where semicircle window for outputting and inputting coupling
Wall with a thickness of 1 millimeter.
Further, the baseplane and hemisphere top surface of the first fluting hemispherical resonator device 15 offer the first rectangle respectively
Slot 152 and the second rectangular channel 153, the baseplane and hemisphere top surface of the second fluting hemispherical resonator device 16 offer third respectively
Rectangular channel 162 and the 4th rectangular channel 163.
Further, 153 edge of the first rectangular channel 152 and the second rectangular channel that the first fluting hemispherical resonator device 15 opens up
The first fluting hemispherical line of symmetry of hemispherical resonator device 15 axisymmetricly opens up；First rectangular channel 152 and described
Two rectangular channels 153 extend perpendicularly to the input port of first wave guide ring flange 11 and the output end of second waveguide ring flange 12
Line between mouthful；The third rectangular channel 162 and the 4th rectangular channel 163 that the second fluting hemispherical resonator device 16 opens up are along described
The hemispherical line of symmetry of second fluting hemispherical resonator device 16 axisymmetricly opens up；The third rectangular channel 162 and the 4th rectangle
Slot 163 extends perpendicularly between the input port of first wave guide ring flange 11 and the output port of second waveguide ring flange 12
Line.
First rectangular channel 152, second rectangular channel 153, the third rectangular channel 162 and the 4th rectangular channel
163 open up feature are as follows:
1. the slotting length direction of second rectangular channel 153 and the 4th rectangular channel 163 is suppressed perpendicular to needing
TM2m1Mould and TE101Faradic direction of the mould on its corresponding slotted hemisphere face, and slotting position is located at TM2m1
Mould and TE101The maximum region of the induced current density of mould.Particularly, in example 2, the second rectangular channel 153 and the 4th square
The length direction of shape slot 163 is each perpendicular to the input port of first wave guide ring flange 11 and the output end of second waveguide ring flange 12
Line between mouthful；
2. the slotting length direction of first rectangular channel 152 and the third rectangular channel 162 is suppressed perpendicular to needing
TE101Faradic direction of the mould on its corresponding slotted baseplane, and slotting position is located at TE101The induction of mould
The region of highest current density.Particularly, in example 2, the length direction of the first rectangular channel 152 and third rectangular channel 162
The line being each perpendicular between the input port of first wave guide ring flange 11 and the output port of second waveguide ring flange 12；
3. the notching construction of first rectangular channel 152 and second rectangular channel 153 is along the first fluting hemispherical resonator
The hemisphere face line of symmetry of device 15 is axisymmetricly；The notching construction of the third rectangular channel 162 and the 4th rectangular channel 163 along
The hemisphere face of second fluting hemispherical resonator device 16 is symmetrically axisymmetricly；
4. first rectangular channel 152, the second rectangular channel 153, third rectangular channel 162 and the 4th rectangular channel 163 open up
Purpose is to destroy TM2m1Mould and TE101The induced current of mould is distributed farthest to inhibit both higher modes.Described
Slotting length and the width satisfaction pair of one rectangular channel 152, the second rectangular channel 153, third rectangular channel 162 and the 4th rectangular channel 163
TM2m1Mould and TE101Mould, which is realized, sufficiently to be inhibited, while not deteriorating basic mode TM significantly101The Q-unloaded of mould.Specifically, second
The width of rectangular channel 153 and the 4th rectangular channel 163 is 4 millimeters, and the corresponding centre of sphere angle of length is 90 degree；First rectangular channel
152 and the width of third rectangular channel 162 be 1.5 millimeters, length is 23 millimeters.
It should be noted that second rectangular channel 153 and the 4th rectangular channel 163 can be realized simultaneously to TM2m1Mould
And TE101The inhibition of mould, because in hemisphere top surface slot area, TM2m1Mould and TE101The induced current of mould have the component of overlapping and
Highest current density.First rectangular channel 152 and the third rectangular channel 162 are then only to TE101Mould generates inhibition, because
Hemisphere baseplane slot area, TE101The induced current density of mould is maximum and TM2m1The induced current density of mould is minimum.
Fig. 6 and Fig. 7 are please referred to, waveguide filter fluting in the embodiment one that Fig. 6 is related to for Fig. 1, Fig. 2 and Fig. 3 of the present invention
Front and back is in X to KuTransmission coefficient (the S emulated in frequency range21Parameter) curve graph, Fig. 7 is the embodiment that Fig. 4 of the present invention and Fig. 5 are related to
Waveguide filter fluting front and back is in X to K in twouTransmission coefficient (the S emulated in frequency range21Parameter) curve graph.
In order to which preliminary identification hemispherical resonator device notching construction is to the inhibiting effect of waveguide filter stopband spurious resonance, to this
Two waveguide filters in the embodiment one that invention figure 1, Fig. 2 and Fig. 3 are related to, and the embodiment two that is related to of Fig. 4 of the present invention and Fig. 5
Physical model carry out Electromagnetic Simulation, simulation result is as shown in Figure 6 and Figure 7.Simulation result shows that hemispherical resonator device presses embodiment
One and embodiment two described in after mode slotted, spurious resonance of two waveguide filters near 14GHz is effectively pressed down
System, the belt resistance inhibitor system of emulation are better than 38dB and 42dB respectively in the frequency range of 10.5GHz to 16.2GHz.
Referring to Fig. 8, Fig. 8 is a kind of flow diagram of waveguide filter manufacturing method provided in an embodiment of the present invention.
As shown in figure 8, the flow chart includes:
S101, the electronic model of adjustment waveguide filter in the system platform of selective laser sintering 3-D printer
Placement angle makes the electronic model tilt preset angle, uses metal using the selective laser sintering 3-D printer
Dusty material prints original workpiece corresponding with the electronic model；
Wherein, the original workpiece includes: first wave guide ring flange, second waveguide ring flange, first wave guide, second waveguide
With four hemispherical resonator devices, the original workpiece is the entirety that can not be split；
Wherein, it by the electronic model of reasonable placement waveguide filter, is allowed to tilt preset angle, to make selectivity
Metal fid is not generated inside waveguide filter metal cavity during laser sintered 3-D printer printing waveguide filter
Material, the cavity body structure of waveguide filter can completely by laser sintered metal powder stacked in multi-layers realization self-sustained at
Type.
Further, the electronic model of waveguide filter is the waveguide designed according to the design principle of foregoing invention embodiment
The threedimensional electronic model of filter.
Further, the first wave guide ring flange of waveguide filter, second waveguide ring flange, first wave guide, second waveguide
It uses metal powder as structural material with four hemispherical resonator devices, is integrally printed by 3-D printer.Metal powder can
Using metal materials such as aluminium alloy, stainless steel and titanium alloys, it is preferred to use Al alloy powder passes through choosing as structural material
The laser sintered 3-D printer of selecting property integrally prints.
Further, using technical grade direct metal laser sintering 3-D printer, the laser that 3-D printer uses for
Yttrium optical fiber laser, in the environment of protecting gas argon gas, carries out selective sintering to Al alloy powder by 400 watts of laser power,
Being sintered region laser spot diameter is 100 microns, and it is 60 microns that longitudinal print resolution, that is, printed material, which stacks thickness,.Selectivity
After laser sintered 3-D printer completes print out task, original workpiece is taken out, following subsequent processing is carried out to original workpiece.
The metal supports that S102, the removal original workpiece outer surface generate in selective laser sintering process,
And polishing and blasting treatment are carried out to original workpiece, finally obtain waveguide filter.
Wherein, in the process that polishing and blasting treatment are carried out to original workpiece, polishing operation is with file and coarse sand
The tools manual grinding outer surface of workpiece such as paper, to obtain more smooth outer surface, sandblasting process will pass through polishing operation
Workpiece, which is placed in sand-blasting machine, carries out comprehensive sandblasting to its surfaces externally and internally, it is therefore an objective to further decrease the aluminium alloy work of sintering
The roughness on part surface.
Referring to Fig. 9, waveguide filter emulation and measurement in the embodiment one that Fig. 9 is related to for Fig. 1, Fig. 2 and Fig. 3 of the present invention
Scattering parameter (S parameter) curve graph, wherein Fig. 9 (a) be waveguide filter near pass-band S parameter curve, Fig. 9 (b) be wave
S parameter curve of the waveguide filter in X to Ku frequency range.
In order to verify the radio-frequency performance of the waveguide filter in the embodiment one that Fig. 1, Fig. 2 and Fig. 3 of the present invention are related to, to wave
The scattering parameter (S parameter) of waveguide filter is emulated and is measured.As can be seen that in the embodiment one that Fig. 1, Fig. 2 and Fig. 3 are related to
Waveguide filter realize the response of desired Chebyshev's bandpass filtering, the free transmission range of measurement is 9.92-10.22GHz,
Passband average insertion loss is 1dB, and passband return loss is better than 15dB, and passband central frequency is compared with simulation value to high frequency offset
About 86MHz (relative frequency offset is about 0.86%).Frequency shift (FS) is led after laser sintered cooling again due to metal material
It causes the air chamber volume contraction of resonator and is less than caused by the preferred value of design.By before the printing to the electronic die of printing
Type, which carries out structure compensation, can reduce frequency shift (FS) caused by volume contraction.The matter for the waveguide filter that integrated 3-D is printed
Amount is 83 grams, and without assembly and any fastener, and test process can be used after completing the process without manual debugging.
Simultaneously it has been also found that notching construction does not generate significant impact, the waveguide filter of test to the passband radio-frequency performance of waveguide filter
The belt resistance inhibitor system of wave device is until 16.4GHz is better than 34dB, until 18GHz belt resistance inhibitor system is better than 11dB, no parasitic stopband
Frequency range is greater than 1.8:1.
Referring to Fig. 10, waveguide filter emulation and measurement in the embodiment two that Figure 10 is related to for Fig. 4 of the present invention and Fig. 5
Scattering parameter (S parameter) curve graph, wherein Figure 10 (a) is the S parameter curve of waveguide filter near pass-band, and Figure 10 (b) is wave
S parameter curve of the waveguide filter in X to Ku frequency range.
In order to verify the radio-frequency performance of the waveguide filter in the embodiment two that Fig. 4 and Fig. 5 of the present invention are related to, waveguide is filtered
The scattering parameter (S parameter) of wave device is emulated and is measured.As can be seen that the waveguide in the embodiment two that Fig. 4 and Fig. 5 are related to is filtered
Wave device realizes desired Chebyshev's bandpass filtering response, and the free transmission range of measurement is 10-10.23GHz, and passband is averagely inserted
Entering loss is 0.9dB, and passband return loss is better than 20dB, and passband central frequency is compared with simulation value to high frequency offset about 115MHz
(relative frequency offset is about 1.15%), frequency shift (FS) be equally due to metal material through it is laser sintered it is cooling again after cause it is humorous
Shake device air chamber volume contraction and be less than design preferred value caused by.By before the printing to the electronic model of printing into
Row structure compensation can reduce frequency shift (FS) caused by volume contraction.The quality for the waveguide filter that integrated 3-D is printed is
103 grams, and without assembly and any fastener, test process can be used after completing the process without manual debugging.Simultaneously
It has been also found that notching construction does not generate significant impact, the waveguide filter of test to the passband radio-frequency performance of waveguide filter
Belt resistance inhibitor system until 16.4GHz be better than 32dB, until 18GHz belt resistance inhibitor system be better than 11dB, no parasitic stopband frequency
Range is greater than 1.8:1.
In two embodiments provided herein, it should be understood that disclosed structure and processing method, Ke Yitong
Other modes are crossed to realize.For example, two example structures of waveguide filter described above are only schematical, example
Such as: the notch size of rectangular channel, only several achievable physical structures can follow the design principle of filter in practice
Other reasonable sizes are designed as with working frequency, other shapes of cavity grooved pattern can also be designed and reach inhibition electromagnetic wave
The purpose of higher order resonances mode, can also be by changing the order of waveguide filter, the quantity and coupling of fluting hemispherical resonator device
The flexible filter construction design of the realizations such as topology, the position slotted and more preferably radio-frequency responsive.In addition, waveguide filter adds
Work can also realize using other metal powder materials by selective laser sintering or selective laser melting technique, can also be with
It is aided with surface metalation technique using other increases material manufacturing technologies based on nonmetallic materials to realize, it can be according to practical application
Demand select suitable 3-D printed material and 3-D printer.
The above are the descriptions to a kind of waveguide filter provided by the present invention and its manufacturing method, for the skill of this field
Art personnel, thought according to an embodiment of the present invention, there will be changes in the specific implementation manner and application range, to sum up,
The contents of this specification are not to be construed as limiting the invention.
Claims (8)
1. a kind of waveguide filter, which is characterized in that the waveguide filter includes:
First wave guide ring flange, second waveguide ring flange, first wave guide, second waveguide and four hemispherical resonator devices；
The first wave guide and the second waveguide are rectangular waveguide, one end of the first wave guide and the first wave inducing defecation by enema and suppository
Blue disk is connected, and the other end is connected with the hemispherical resonator device, one end of the second waveguide and the second waveguide ring flange phase
Even, the other end is connected with the hemispherical resonator device；
Four hemispherical resonator devices are arranged between the first wave guide and second waveguide, be air filling cavity it is humorous
Shake device, and the baseplane between the adjacent device of hemispherical resonator two-by-two mutually abuts and misplaces and cascades and arrange in conllinear formula.
2. waveguide filter according to claim 1, which is characterized in that
The hemisphere top surface of four hemispherical resonator devices offers the rectangular channel of perforation；
The rectangular channel of the hemispherical resonator device is axisymmetricly opened up along the hemispherical line of symmetry of hemispherical resonator device；
The input port for extending perpendicularly to first wave guide ring flange and second for the rectangular channel that the hemispherical resonator device opens up
Line between the output port of waveguide flange.
3. waveguide filter according to claim 2, which is characterized in that
Circular window is offered at four hemispherical resonator devices mutually abutting for carrying out electromagnetism between adjacent hemispherical resonator device
The coupling of energy, head and the tail two hemispherical resonator device baseplanes on offer semicircle window for respectively with first wave guide and
The coupling of second waveguide progress electromagnetic energy.
4. a kind of waveguide filter, which is characterized in that the waveguide filter includes:
First wave guide ring flange, second waveguide ring flange, first wave guide, second waveguide and four hemispherical resonator devices；
The first wave guide and the second waveguide are rectangular waveguide, one end of the first wave guide and the first wave inducing defecation by enema and suppository
Blue disk is connected, and the other end is connected with the hemispherical resonator device, one end of the second waveguide and the second waveguide ring flange phase
Even, the other end is connected with the hemispherical resonator device；
Four hemispherical resonator devices are arranged between the first wave guide and second waveguide, be air filling cavity it is humorous
Shake device, and four hemispherical resonator devices include: two slotlesses being coupled respectively with the first wave guide and the second waveguide
Hemispherical resonator device, and two fluting hemispherical resonator devices being coupled respectively with two slotless hemispherical resonator devices；
Two fluting hemispherical resonator devices and two slotless hemispherical resonator device baseplanes directions are consistent, two-by-two adjacent hemisphere
Cascade is mutually abutted between resonator and is arranged in conllinear formula.
5. waveguide filter according to claim 4, which is characterized in that
The baseplane and hemisphere top surface of the fluting hemispherical resonator device offer the rectangular channel of perforation；
The rectangular channel of the fluting hemispherical resonator device hemisphere top surface and baseplane is hemispherical right along the fluting hemispherical resonator device
Line is claimed axisymmetricly to open up；
The rectangular channel that the fluting hemispherical resonator device hemisphere top surface and baseplane open up extends perpendicularly to first wave inducing defecation by enema and suppository
Line between the input port of blue disk and the output port of second waveguide ring flange.
6. waveguide filter according to claim 5, which is characterized in that
Rectangular window is offered at the abutting of the two neighboring hemispherical resonator device for carrying out electricity between adjacent hemispherical resonator device
The coupling of magnetic energy offers semicircle window for respectively with first on two slotless hemispherical resonator device baseplanes of head and the tail
Waveguide and second waveguide carry out the coupling of electromagnetic energy.
7. according to claim 1 to waveguide filter described in 6 any one, which is characterized in that the first wave guide ring flange
Contain multiple through-holes with the second waveguide ring flange；
The first wave guide ring flange, the second waveguide ring flange, the first wave guide, the second waveguide and four described
Hemispherical resonator device uses metal powder as structural material, and by selective laser sintering 3-D printer, integrally printing is made.
8. a kind of waveguide filter manufacturing method, which is characterized in that the method is for any one of manufacturing claims 1 to 7 institute
The waveguide filter stated, which comprises
The placement angle of the electronic model of waveguide filter is adjusted in the system platform of selective laser sintering 3-D printer,
So that the electronic model is tilted preset angle, uses metal powder material using the selective laser sintering 3-D printer
Print original workpiece corresponding with the electronic model；
Wherein, the original workpiece includes: first wave guide ring flange, second waveguide ring flange, first wave guide, second waveguide and four
A hemispherical resonator device, the original workpiece are the entirety that can not be split；
The metal supports generated in selective laser sintering process on the original workpiece outer surface are removed, and to original
Workpiece carries out polishing and blasting treatment, obtains the waveguide filter.
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| CN110504516A (en) * | 2019-08-30 | 2019-11-26 | 西安交通大学 | Deformed spherical waveguide resonator, filter based on same and processing method of deformed spherical waveguide resonator |
| CN110828959A (en) * | 2019-10-31 | 2020-02-21 | 西安交通大学 | Deformed ellipsoid resonant cavity and dual-mode waveguide filter based on same and without tuning |
| CN113328713A (en) * | 2021-05-08 | 2021-08-31 | 南京邮电大学 | Vertically stacked packaging filter |
| CN113644396A (en) * | 2021-07-06 | 2021-11-12 | 广东盛路通信科技股份有限公司 | Four-mode four-pass band filter based on hemispherical resonant cavity |
| CN114665243A (en) * | 2022-04-28 | 2022-06-24 | 西安交通大学 | Quasi-sphere dual-mode resonant cavity, waveguide filter and waveguide multiplexer |
| CN115084810A (en) * | 2022-07-21 | 2022-09-20 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Miniaturized high-frequency high-order mode harmonic suppression waveguide filter |
| CN115117581A (en) * | 2022-07-19 | 2022-09-27 | 电子科技大学 | High no-load Q value filtering power divider based on 3D printing |
| CN116315539A (en) * | 2022-09-29 | 2023-06-23 | 西安空间无线电技术研究所 | High-power cavity filter easy for 3D printing |
| CN116315539B (en) * | 2022-09-29 | 2024-05-31 | 西安空间无线电技术研究所 | High-power cavity filter easy for 3D printing |
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| CN110504516A (en) * | 2019-08-30 | 2019-11-26 | 西安交通大学 | Deformed spherical waveguide resonator, filter based on same and processing method of deformed spherical waveguide resonator |
| CN110504516B (en) * | 2019-08-30 | 2021-01-19 | 西安交通大学 | Deformed spherical waveguide resonator, filter based on same and processing method of deformed spherical waveguide resonator |
| CN110828959A (en) * | 2019-10-31 | 2020-02-21 | 西安交通大学 | Deformed ellipsoid resonant cavity and dual-mode waveguide filter based on same and without tuning |
| CN110828959B (en) * | 2019-10-31 | 2020-11-10 | 西安交通大学 | Deformed ellipsoid resonant cavity and dual-mode waveguide filter based on same and without tuning |
| CN113328713B (en) * | 2021-05-08 | 2022-10-14 | 南京邮电大学 | Vertically stacked packaging filter |
| CN113328713A (en) * | 2021-05-08 | 2021-08-31 | 南京邮电大学 | Vertically stacked packaging filter |
| CN113644396A (en) * | 2021-07-06 | 2021-11-12 | 广东盛路通信科技股份有限公司 | Four-mode four-pass band filter based on hemispherical resonant cavity |
| CN114665243A (en) * | 2022-04-28 | 2022-06-24 | 西安交通大学 | Quasi-sphere dual-mode resonant cavity, waveguide filter and waveguide multiplexer |
| CN115117581A (en) * | 2022-07-19 | 2022-09-27 | 电子科技大学 | High no-load Q value filtering power divider based on 3D printing |
| CN115117581B (en) * | 2022-07-19 | 2023-08-22 | 电子科技大学 | Filtering power divider with high unloaded Q value based on 3D printing |
| CN115084810A (en) * | 2022-07-21 | 2022-09-20 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Miniaturized high-frequency high-order mode harmonic suppression waveguide filter |
| CN116315539A (en) * | 2022-09-29 | 2023-06-23 | 西安空间无线电技术研究所 | High-power cavity filter easy for 3D printing |
| CN116315539B (en) * | 2022-09-29 | 2024-05-31 | 西安空间无线电技术研究所 | High-power cavity filter easy for 3D printing |
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